Kia ora, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
263 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.47%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Somysolanki | 7/10 | 168 days | 100% |
| Anne | 7/10 | 503 days | 87% |
| ros fraser | 4/10 | 2513 days | 3% |
| wynden | 1/10 | 2541 days | 2% |
| Rado Hank | 10/10 | 2628 days | 4% |
| Lizzie Edmonds | 8/10 | 2629 days | 4% |
| Anis Quentin | 7/10 | 2636 days | 3% |
| Jeny Smolders | 7/10 | 2640 days | 3% |
| Oscar Petersen | 8/10 | 2647 days | 4% |
| Ani | 9/10 | 2756 days | 3% |
| Martin Murlik | 8/10 | 2868 days | 3% |
| Laura | 9/10 | 2879 days | 3% |
| Melanie Farrell | 7/10 | 2887 days | 3% |
| Andy | 10/10 | 2894 days | 3% |
| Julia Achatz | 5/10 | 2908 days | 2% |
| Auba Mateos | 7/10 | 2914 days | 3% |
| Charlotte | 7/10 | 2914 days | 3% |
| Isabel Zedelius | 8/10 | 2917 days | 3% |
| Dries | 8/10 | 2957 days | 3% |
| Clarissa Glaser | 8/10 | 2958 days | 3% |
| Alna | 10/10 | 2963 days | 3% |
| Holger Worner | 9/10 | 2963 days | 3% |
| Karlee Hormell | 9/10 | 2972 days | 3% |
| Alonso | 9/10 | 2976 days | 3% |
| Rose Guillaume | 8/10 | 2979 days | 3% |
| Caroline Coudray | 8/10 | 2983 days | 3% |
| Barbara | 8/10 | 2983 days | 3% |
| Leonie Brabers | 7/10 | 2991 days | 3% |
| Bina Johansson | 10/10 | 2991 days | 3% |
| Sam Staines | 9/10 | 2995 days | 3% |
| Erik | 6/10 | 2998 days | 3% |
| Nicole Signer | 8/10 | 3005 days | 3% |
| Sam Taylor | 7/10 | 3009 days | 3% |
| Vanuxem | 8/10 | 3213 days | 2% |
| Clara Bertomeu | 10/10 | 3213 days | 2% |
| Lukas Boller | 9/10 | 3215 days | 2% |
| Mette Elholm | 7/10 | 3229 days | 2% |
| Mathilde Arp | 8/10 | 3229 days | 2% |
| Chloe and Guillame | 9/10 | 3233 days | 2% |
| Andre | 9/10 | 3235 days | 2% |
| Doerte | 10/10 | 3235 days | 2% |
| Saskia Peek | 9/10 | 3236 days | 2% |
| Erika Tarant | 8/10 | 3236 days | 2% |
| Jennifer Nguyen | 7/10 | 3237 days | 2% |
| Julie Duvert | 7/10 | 3237 days | 2% |
| Dan Ramsl | 4/10 | 3237 days | 2% |
| Lucy Mulvin | 7/10 | 3238 days | 2% |
| Fine Kochling | 9/10 | 3240 days | 2% |
| Eberhard | 9/10 | 3240 days | 2% |
| Hannes | 8/10 | 3241 days | 2% |
| Calum Penn | 9/10 | 3243 days | 2% |
| Arthur Portolleau | 6/10 | 3244 days | 2% |
| Elisabet | 10/10 | 3245 days | 2% |
| Tommy Mannien | 8/10 | 3246 days | 2% |
| Solange Bourbeois | 8/10 | 3249 days | 2% |
| Talissa Missiato | 10/10 | 3249 days | 2% |
| Severin Knegsch | 9/10 | 3250 days | 2% |
| Pierre Jouffineau | 10/10 | 3251 days | 2% |
| Lewis Whittle | 8/10 | 3253 days | 2% |
| Ben and Pauline | 8/10 | 3255 days | 2% |
| Ann-Kathrin | 7/10 | 3260 days | 2% |
| Natasha Harbinson | 10/10 | 3261 days | 2% |
| Sebastian | 2/10 | 3262 days | 1% |
| Jaquein Bucholz | 3/10 | 3262 days | 1% |
| Chiara | 7/10 | 3262 days | 2% |
| Cariotta Kemper | 3/10 | 3262 days | 1% |
| Megan Lenox | 7/10 | 3265 days | 2% |
| Max Mustermann | 8/10 | 3267 days | 2% |
| Amy Stafford | 8/10 | 3270 days | 2% |
| Carl | 7/10 | 3270 days | 2% |
| Briony | 7/10 | 3272 days | 2% |
| Melanie Kronbichler | 8/10 | 3273 days | 2% |
| Andreas Schiefer | 7/10 | 3274 days | 2% |
| Veronique Kaplan | 3/10 | 3276 days | 1% |
| Robin Ings | 6/10 | 3277 days | 2% |
| Stula Vladimir | 7/10 | 3278 days | 2% |
| David Soukal | 8/10 | 3278 days | 2% |
| Olivia Aliprandi | 7/10 | 3279 days | 2% |
| Isabelle | 2/10 | 3281 days | 1% |
| Jonathan Gourmel | 8/10 | 3281 days | 2% |
| Mikkel Palleson | 4/10 | 3284 days | 2% |
| Franziska and Sabine | 7/10 | 3285 days | 2% |
| Chloe Guerillot | 7/10 | 3285 days | 2% |
| Faye Oliver | 7/10 | 3287 days | 2% |
| Iris Kerbler | 9/10 | 3287 days | 2% |
| Til Schaebitz | 6/10 | 3288 days | 2% |
| Elisabeth Grabner | 9/10 | 3290 days | 2% |
| Berith | 10/10 | 3290 days | 2% |
| Chris Simpson | 6/10 | 3293 days | 2% |
| Pekka and Jonna | 9/10 | 3293 days | 2% |
| Jonas Hoerning | 8/10 | 3294 days | 2% |
| Nils | 10/10 | 3294 days | 2% |
| Mark Rosema | 8/10 | 3295 days | 2% |
| Lisa Huber | 10/10 | 3295 days | 2% |
| Nicola Wiggan | 9/10 | 3316 days | 2% |
| Linda and Gunther | 4/10 | 3317 days | 1% |
| Julie | 9/10 | 3318 days | 2% |
| Maria Schaer | 7/10 | 3322 days | 2% |
| Mette and Jesper | 5/10 | 3324 days | 2% |
| Pierre and Alexandra | 6/10 | 3330 days | 2% |
| Julia Waenninger | 8/10 | 3342 days | 2% |
| Sarah Boettcher | 9/10 | 3378 days | 2% |
| Suzanne Vermeulen | 6/10 | 3395 days | 2% |
| Blandine Giusti | 7/10 | 3598 days | 2% |
| Bart Hanssen | 6/10 | 3677 days | 1% |
| Astrid Egesten | 7/10 | 3729 days | 1% |
| Jean Curry | 9/10 | 3952 days | 1% |
| Carla Oyarzun | 1/10 | 3956 days | 0% |
| Philippe Chiasson | 9/10 | 3962 days | 1% |
| Helma Druyken | 4/10 | 3972 days | 1% |
| Florian Guttler | 7/10 | 3975 days | 1% |
| Casandra Prunica | 8/10 | 3976 days | 1% |
| Lauren Hedley | 7/10 | 3976 days | 1% |
| Janina Zwerver | 8/10 | 3976 days | 1% |
| Marieke Feyteres | 4/10 | 3980 days | 1% |
| van Linda Werner | 5/10 | 3980 days | 1% |
| Philip Donachie | 7/10 | 3990 days | 1% |
| Luisa Bach | 8/10 | 3990 days | 1% |
| Kristina | 7/10 | 3992 days | 1% |
| Eugen Lehner | 6/10 | 3993 days | 1% |
| Manuel Bach | 7/10 | 3993 days | 1% |
| Matthias Freiling | 2/10 | 4000 days | 0% |
| Debora Grusler | 6/10 | 4003 days | 1% |
| Andreas Brodhaeker | 8/10 | 4016 days | 1% |
| Renee van der Syde | 7/10 | 4017 days | 1% |
| Martha Horst | 8/10 | 4017 days | 1% |
| Roland Beer | 7/10 | 4021 days | 1% |
| Johanna Bak | 4/10 | 4021 days | 0% |
| Lior Bakski | 9/10 | 4031 days | 1% |
| Bet | 9/10 | 4032 days | 1% |
| Memain | 8/10 | 4305 days | 0% |
| Konza | 7/10 | 4306 days | 0% |
| Steen Rausmussen | 8/10 | 4337 days | 0% |
| David Restell | 10/10 | 4367 days | 0% |
| Christina Rodewald | 9/10 | 4372 days | 0% |
| Hanneke P | 7/10 | 4398 days | 1% |
| Kohler | 9/10 | 4418 days | 1% |
| Alexandra van den Brack | 6/10 | 4426 days | 1% |
| Paul Lawrence | 9/10 | 4427 days | 1% |
| Abby Rushmer | 7/10 | 4428 days | 1% |
| Stephan Olivier | 7/10 | 4433 days | 1% |
| Stephan Olivier | 7/10 | 4433 days | 1% |
| Faassen | 8/10 | 4437 days | 1% |
| Julie Lamart | 8/10 | 4438 days | 1% |
| Adrian Weidell | 5/10 | 4634 days | 1% |
| Jonathan Tuthill | 9/10 | 4689 days | 1% |
| A Ormsby | 10/10 | 4701 days | 1% |
| Gillian Rowe | 10/10 | 4714 days | 1% |
| Ryan Pynappels | 8/10 | 4715 days | 1% |
| Peter Dellen | 8/10 | 4716 days | 1% |
| Jorg Steffens | 8/10 | 4716 days | 1% |
| Danielle & Jobbe | 9/10 | 4718 days | 1% |
| Christina | 6/10 | 4719 days | 1% |
| Jop Veldhuis | 7/10 | 4719 days | 1% |
| Paul Weidenfeld | 8/10 | 4720 days | 1% |
| Sophie Dorrepaal | 7/10 | 4720 days | 1% |
| Fannette Peyreplane | 5/10 | 4721 days | 1% |
| Norm Cooper | 7/10 | 4725 days | 1% |
| Gloria, Rose & An | 8/10 | 4725 days | 1% |
| A Sorg | 10/10 | 4725 days | 1% |
| Samplonius | 5/10 | 4728 days | 1% |
| Petra | 10/10 | 4728 days | 1% |
| Bethany Hamilton | 8/10 | 4732 days | 1% |
| suffolkhouse69 | 9/10 | 4733 days | 1% |
| a a | 8/10 | 4764 days | 1% |
| Julia Balionis | 7/10 | 4778 days | 1% |
| Julia Hartman | 3/10 | 4779 days | 1% |
| Fabienne Indergand | 7/10 | 4799 days | 1% |
| Waldemar Schuler | 9/10 | 4811 days | 1% |
| pepette31 | 7/10 | 4886 days | 1% |
| Craig Hathaway | 9/10 | 5038 days | 1% |
| Stephane Lebel | 9/10 | 5043 days | 1% |
| Rens Hemselmans | 7/10 | 5056 days | 1% |
| Isabell | 10/10 | 5058 days | 1% |
| Holly Cave | 5/10 | 5058 days | 1% |
| J Palmer | 6/10 | 5062 days | 1% |
| Liz & Jim | 10/10 | 5064 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5066 days | 1% |
| Simon Vickers | 2/10 | 5069 days | 0% |
| Leslie | 8/10 | 5082 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5083 days | 1% |
| Selina Mueller | 7/10 | 5084 days | 1% |
| Tamlin Barton | 3/10 | 5085 days | 1% |
| Cara Dungay | 8/10 | 5086 days | 1% |
| Bottcher | 10/10 | 5086 days | 1% |
| Alexandra | 10/10 | 5087 days | 1% |
| Philipp Rau | 7/10 | 5089 days | 1% |
| Dan Aldridge | 9/10 | 5091 days | 1% |
| John Allen | 8/10 | 5093 days | 1% |
| Curtis Penner | 8/10 | 5093 days | 1% |
| Brandt | 8/10 | 5095 days | 1% |
| Nadia Husain | 5/10 | 5098 days | 1% |
| T J Andrews | 6/10 | 5114 days | 1% |
| Charli Skinner | 7/10 | 5365 days | 1% |
| Carl_Larsen | 10/10 | 5374 days | 1% |
| Susan & Richard | 10/10 | 5435 days | 1% |
| Rik | 9/10 | 5436 days | 1% |
| Jonathan Martin | 7/10 | 5438 days | 1% |
| Gunda G | 9/10 | 5443 days | 1% |
| Aaron | 8/10 | 5445 days | 1% |
| Will Jemma | 6/10 | 5448 days | 1% |
| Christen Hans | 10/10 | 5449 days | 1% |
| Monica and Danie. | 7/10 | 5457 days | 1% |
| Stephen | 5/10 | 5459 days | 1% |
| Susan | 10/10 | 5459 days | 1% |
| snodge | 8/10 | 5463 days | 1% |
| Bo Moenstead | 9/10 | 5472 days | 1% |
| Alain Deslandres | 8/10 | 5476 days | 1% |
| Jakob Jurgen | 10/10 | 5477 days | 1% |
| EA Anders | 8/10 | 5480 days | 1% |
| Helen and Hans Walser | 1/10 | 5483 days | 0% |
| kevinp | 8/10 | 5506 days | 1% |
| warrenp | 9/10 | 5510 days | 1% |
| braunweiler | 9/10 | 5514 days | 1% |
| pimn | 9/10 | 5519 days | 1% |
| asiacritics | 7/10 | 5525 days | 1% |
| Chris Mackamul | 8/10 | 5532 days | 1% |
| Debbie Rathbone | 10/10 | 5532 days | 1% |
| Lisette X | 9/10 | 5533 days | 1% |
| Martin | 10/10 | 5535 days | 1% |
| Thomas Willi | 10/10 | 5535 days | 1% |
| Elodie | 7/10 | 5536 days | 1% |
| richardh | 7/10 | 5650 days | 1% |
| trvlbug | 8/10 | 5678 days | 1% |
| glennandjen | 10/10 | 5739 days | 1% |
| BryonyS | 9/10 | 5757 days | 1% |
| Marion | 9/10 | 5773 days | 1% |
| Mikey | 7/10 | 5774 days | 1% |
| Richard Komzik | 6/10 | 5775 days | 1% |
| Michael Walsall | 10/10 | 5779 days | 1% |
| Anna | 8/10 | 5793 days | 1% |
| Abigail | 7/10 | 5793 days | 1% |
| lannie | 7/10 | 5803 days | 1% |
| SimonR | 8/10 | 5803 days | 1% |
| SonjaG | 7/10 | 5803 days | 1% |
| Chris | 8/10 | 5809 days | 1% |
| AurelieD | 8/10 | 5816 days | 1% |
| Yunker | 10/10 | 5817 days | 1% |
| Andrew | 8/10 | 5819 days | 1% |
| Erin | 9/10 | 5820 days | 1% |
| Christopher Gallaga | 8/10 | 5825 days | 1% |
| Amy | 10/10 | 5831 days | 1% |
| Shona | 8/10 | 5831 days | 1% |
| plumbaum | 9/10 | 5833 days | 1% |
| Sandra | 10/10 | 5841 days | 1% |
| Evangelista | 8/10 | 5841 days | 1% |
| Oliver | 5/10 | 5843 days | 1% |
| Kat | 9/10 | 5873 days | 1% |
| Lisa | 8/10 | 5900 days | 1% |
| siobhan | 8/10 | 5902 days | 1% |
| Alice | 8/10 | 5902 days | 1% |
| NORTZ | 7/10 | 5931 days | 1% |
| Stefan | 8/10 | 5933 days | 1% |
| Hugh Trenchard | 9/10 | 5949 days | 1% |
| Niamh | 4/10 | 5956 days | 1% |
| Jenny | 9/10 | 5979 days | 1% |
| Louise | 8/10 | 5988 days | 1% |
| Peddy | 10/10 | 5998 days | 1% |
| Katie Wise | 8/10 | 6001 days | 1% |
| Thomas Bachmann | 8/10 | 6017 days | 1% |
| Daniala | 8/10 | 6036 days | 1% |
| Tom Ben | 9/10 | 6140 days | 1% |
| Sarah Maudsley | 8/10 | 6155 days | 1% |
| Alan Bellerby | 8/10 | 6155 days | 1% |
| Tina Daly | 5/10 | 6161 days | 1% |
| John Woodrow | 8/10 | 6170 days | 1% |
| Ernst Seter | 9/10 | 6170 days | 1% |
| Jim Curley | 7/10 | 6181 days | 1% |
| Daniel | 7/10 | 6182 days | 1% |
| Marc Hertogs | 7/10 | 6185 days | 1% |
| Laura Sutton | 5/10 | 6209 days | 1% |
| Jeroen | 5/10 | 6211 days | 1% |
| Mum! | 6/10 | 6211 days | 1% |
| Gail | 9/10 | 6215 days | 1% |
| Heike Julia | 6/10 | 6216 days | 1% |
| Lanni | 8/10 | 6216 days | 1% |
| Amanda Finger | 7/10 | 6217 days | 1% |
| Desiree Muri | 7/10 | 6217 days | 1% |
| Jan Grzejik | 8/10 | 6244 days | 1% |
| Wouter Ewalts | 8/10 | 6251 days | 1% |
| Matilde | 6/10 | 6259 days | 1% |
| Kim | 6/10 | 6456 days | 1% |
| Gillian | 8/10 | 6498 days | 1% |
| Denise Nick | 6/10 | 6508 days | 1% |
| ranker_110 | 8/10 | 6527 days | 1% |
| Jasper | 7/10 | 6534 days | 1% |
| Mary | 8/10 | 6534 days | 1% |
| Lucy | 6/10 | 6534 days | 1% |
| Lukas | 8/10 | 6545 days | 1% |
| Hanna | 7/10 | 6547 days | 1% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-3.12% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 46 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Waitomo Glowworm Caves experience has been adjusted for 153 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 150 | -3.06% |
| 151 | -3.08% |
| 152 | -3.10% |
| 153 | -3.12% |
| 154 | -3.14% |
| 155 | -3.17% |
| 156 | -3.19% |
| … | … |
Balancing Adjustment
5.79% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.